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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 731769.0, MPI für Astronomie / Publikationen_mpia
A high-resolution spectrograph for the 72cm Waltz Telescope at Landessternwarte, Heidelberg
Authors:Tala, M.; Heeren, P.; Grill, M.; Harris, R. J.; Stürmer, J.; Schwab, C.; Gutcke, T.; Reffert, S.; Quirrenbach, A.; Seifert, W.; Mandel, H.; Geuer, L.; Schäffner, L.; Thimm, G.; Seeman, U.; Tietz, J.; Wagner, K.
Place of Publication:Bellingham, Wash.
Publisher:SPIE
Date of Publication (YYYY-MM-DD):2016
Audience:Not Specified
Abstract / Description:The Waltz Spectrograph is a fiber-fed high-resolution échelle spectrograph for the 72 cm Waltz Telescope at the Landessternwarte, Heidelberg. It uses a 31.6 lines/mm 63.5° blaze angle échelle grating in white-pupil configuration, providing a spectral resolving power of R 65,000 covering the spectral range between 450-800nm in one CCD exposure. A prism is used for cross-dispersion of échelle orders. The spectrum is focused by a commercial apochromat onto a 2k×2k CCD detector with 13.5μm per pixel. An exposure meter will be used to obtain precise photon-weighted midpoints of observations, which will be used in the computation of the barycentric corrections of measured radial velocities. A stabilized, newly designed iodine cell is employed for measuring radial velocities with high precision. Our goal is to reach a radial velocity precision of better than 5 m/s, providing an instrument with sufficient precision and sensitivity for the discovery of giant exoplanets. Here we describe the design of the Waltz spectrograph and early on-sky results.
External Publication Status:published
Document Type:Other
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2016SPIE.9908E..6OT
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